In the rcp client in MIT krb5-appl through 1.0.3, malicious servers could bypass intended access restrictions via the filename of . or an e…

published 2021-02-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2019-11471

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

In the rcp client in MIT krb5-appl through 1.0.3, malicious servers could bypass intended access restrictions via the filename of . or an empty filename, similar to CVE-2018-20685 and CVE-2019-7282. The impact is modifying the permissions of the target directory on the client side. NOTE: MIT krb5-appl is not supported upstream but is shipped by a few Linux distributions. The affected code was removed from the supported MIT Kerberos 5 (aka krb5) product many years ago, at version 1.8.

Patch / fix

distros 1

krb5-appl SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +13 more 1.0.3-3.6.1

suse advisories SUSE-SU-2021:0527-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-25018 updated 2026-11-07 cvss 7.5

krb5-appl: Improper directory name validation allows malicious server to bypass access restrictions

Red Hat Enterprise Linux 6 krb5-appl, krb5-appl-clients, krb5-appl-servers
affected: no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.57% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

bugzilla.suse.com https://bugzilla.suse.com/show_bug.cgi?id=1131109 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N

References

bugzilla.suse.com /show_bug.cgi?id=1131109
exploit, issue-tracking, third-party-advisory

Sources

CVE List CVE-2019-25018
NVD CVE-2019-25018

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary